The Big 12 led all conferences with eight teams in the championship. The SEC and Pac-10 placed seven in the field while five teams from Conference USA were selected.

The Missouri Tigers earned the No. 5 seed overall and will host for the third straight season. MU was crowned Big 12 champions earlier Sunday and has a record of 46-7 on the season. The Tigers will face Illinois State on Friday.

Oklahoma State will compete in the Knoxville Regional and will face Georgia Tech in a nationally televised game on ESPNU. The postseason appearance is the third straight and 18th overall for the Cowgirls.

For the 10th consecutive year and 22nd overall, the No. 18 Texas A&M softball team earned a bid to the NCAA Tournament as an at-large selection. The Aggies closed the regular season at 41-13 and are matched up against Sacred Heart for their first game.

No. 9-seed Oklahoma received an at-large bid to the tournament for the 18th straight time and 19th overall. The Sooners will host the Norman Regional and are set to face Iona in their first matchup.

Texas Tech (36-16) has earned its second straight at-large bid to the NCAA Regionals after a 10-year absence from the event. The Red Raiders will travel to Tucson, Ariz. to face New Mexico State.

Baylor is making its first appearance since 2009 and sixth overall. The No. 11-seed Bears will travel to College Park, Md. to square off against Lehigh.

Nebraska's postseason berth marks the 21st overall NCAA Tournament appearance for the Huskers and is the 16th time the Huskers have made the postseason in the past 17 seasons. NU will face Fresno State in the Stanford Regional.

The Texas Longhorns will be making their seventh-straight and 12th overall NCAA appearance when they host the Austin Regional against Texas State. No. 3-seed UT was the Big 12 runner-up with a conference record of 14-4 and an overall record of 45-8.

The NCAA Division I Softball Championship provides for a field of 64 teams. Thirty conferences were awarded automatic qualification, and the remaining 34 slots were filled with at-large selections to complete the bracket. The top 16 teams were seeded nationally.

Team pairings were determined by geographical proximity, with the exception that teams from the same conference were not paired during regional competition, when possible.

The regional winners advance to super regional competition for a best-of-three series May 26-29 at eight campus sites. The remaining eight teams advance to the Women's College World Series, an eight-team, double-elimination tournament. The championship final will be a best-of-three-series. The WCWS will be conducted June 2-8 at the ASA Hall of Fame Stadium in Oklahoma City.